\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{460}\\{231}\end{array}}\\\hline{\,\,\,691}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{375}\\{622}\end{array}}\\\hline{\,\,\,997}\end{array}\)
\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{800}\\{\,\,37}\end{array}}\\\hline{\,\,\,837}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{923}\\{\,\,\,\,6}\end{array}}\\\hline{\,\,\,929}\end{array}\)